JP2000029055A - Liquid crystal display device - Google Patents
Liquid crystal display deviceInfo
- Publication number
- JP2000029055A JP2000029055A JP19330398A JP19330398A JP2000029055A JP 2000029055 A JP2000029055 A JP 2000029055A JP 19330398 A JP19330398 A JP 19330398A JP 19330398 A JP19330398 A JP 19330398A JP 2000029055 A JP2000029055 A JP 2000029055A
- Authority
- JP
- Japan
- Prior art keywords
- liquid crystal
- display device
- crystal display
- substrate
- layer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1339—Gaskets; Spacers; Sealing of cells
- G02F1/13394—Gaskets; Spacers; Sealing of cells spacers regularly patterned on the cell subtrate, e.g. walls, pillars
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133509—Filters, e.g. light shielding masks
- G02F1/133514—Colour filters
- G02F1/133516—Methods for their manufacture, e.g. printing, electro-deposition or photolithography
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、液晶材料の複屈折
効果に基づいて、液晶層の表示面側に出射される光のオ
ンオフまたは増減調整を行う液晶表示装置に関する。[0001] 1. Field of the Invention [0002] The present invention relates to a liquid crystal display device for turning on / off or increasing / decreasing light emitted to a display surface side of a liquid crystal layer based on a birefringence effect of a liquid crystal material.
【０００２】[0002]
【従来の技術】液晶表示装置は、薄型、軽量、低消費電
力、及び、目に与える疲労の少なさといった優れた特性
により、ノートパソコン、携帯可能なワープロ専用機の
表示装置等に広範に利用されており、ますます用途及び
市場が拡大している。2. Description of the Related Art Liquid crystal display devices are widely used in notebook computers, display devices for portable word processors, etc. due to their excellent characteristics such as thinness, light weight, low power consumption, and low eye fatigue. Applications and markets are growing.
【０００３】近年、中小型の液晶表示装置の市場が引き
続き拡大するのみならず、表示画面が１３インチ以上の
大型の液晶表示装置の市場が急速に立ち上がっている。
このような大型の液晶表示装置にあっては、色調やコン
トラストの視野角依存性を低減することが課題となって
いる。特には、ＣＡＤ等に使用可能な大型液晶モニタ
や、会議・面談用ディスプレイ等では視野角依存性の低
減が大きな課題となる。In recent years, not only has the market for small and medium-sized liquid crystal display devices continued to expand, but also the market for large-sized liquid crystal display devices having a display screen of 13 inches or more has been rapidly rising.
In such a large-sized liquid crystal display device, reducing the viewing angle dependence of color tone and contrast has been a problem. In particular, in a large-sized liquid crystal monitor that can be used for CAD and the like, and a display for meetings and interviews, reduction of the viewing angle dependency is a major issue.
【０００４】視野角依存性を解決する方法の一つとし
て、液晶材料の複屈折効果を利用した液晶表示装置、特
にはＩＰＳ(In-Plane Swithching)型液晶表示装置の研
究及び開発が盛んに行われている。As one method of solving the viewing angle dependence, research and development of a liquid crystal display device utilizing the birefringence effect of a liquid crystal material, particularly an IPS (In-Plane Swithching) type liquid crystal display device, have been actively conducted. Have been done.
【０００５】ＩＰＳ型液晶表示装置の液晶表示の原理に
ついて図５の模式図を用いて説明する。ここでは、ノー
マリ・ブラックモードで動作するＩＰＳ型液晶表示装置
を例にとり説明する。The principle of the liquid crystal display of the IPS type liquid crystal display device will be described with reference to the schematic diagram of FIG. Here, an IPS type liquid crystal display device operating in a normally black mode will be described as an example.
【０００６】液晶分子は、基板面に対して略水平に、互
いに略平行に配向される。The liquid crystal molecules are oriented substantially horizontally with respect to the substrate surface and substantially parallel to each other.
【０００７】この液晶分子を保持するアレイ基板２の外
面（図５中では下方の基板の下面）と、表示面側の対向
基板の外面（図５中では上方の基板の上面）とには、そ
れぞれ偏光板１５，２８が、互いの偏光方向が略直交す
るように配置される。The outer surface of the array substrate 2 holding the liquid crystal molecules (the lower surface of the lower substrate in FIG. 5) and the outer surface of the counter substrate on the display surface side (the upper surface of the upper substrate in FIG. 5) The polarizing plates 15 and 28 are arranged such that their polarization directions are substantially orthogonal to each other.
【０００８】初期状態（電圧無印加状態）においては、
図５の左半部に示すように、液晶分子は、下の偏光板２
８の偏光方向と略平行になるように配され、これにより
下方の光源の光を上方の表示面側に透過しない。In an initial state (a state where no voltage is applied),
As shown in the left half of FIG.
8, so that the light of the lower light source is not transmitted to the upper display surface side.
【０００９】一方、図５の右半部に示すように、アレイ
基板２上の各画素（最小表示単位）の領域において、画
素電極２１と対向電極２２との間に電圧が印加される
と、液晶分子の配向（ダイレクタ方向）５が電気力線の
方向に沿う方向に制御され、これにより複屈折効果に基
づいて光が透過される。On the other hand, as shown in the right half of FIG. 5, when a voltage is applied between the pixel electrode 21 and the counter electrode 22 in the area of each pixel (minimum display unit) on the array substrate 2, The alignment (director direction) 5 of the liquid crystal molecules is controlled in the direction along the direction of the electric flux lines, whereby light is transmitted based on the birefringence effect.
【００１０】カラー表示を行うためには、通常、対向基
板１に、光の３原色である赤（Ｒ）、青（Ｂ）及び緑
（Ｇ）の微細な着色領域からなる着色パターンが設けら
れる。カラーフィルタと呼ばれるこの着色パターンは、
互いに隣接する３つの画素ごとに３原色の着色膜をそれ
ぞれ割り当てるものであり、このような隣接する３つの
画素について光の強度の相対比を調整することにより色
調表示を可能とするものである。カラー表示を行う表示
装置にあっては、Ｒ、Ｇ及びＢの３つの最小表示単位の
組を１画素と数える場合も多いが、本明細書において
は、最小表示単位を画素と呼ぶことにする。In order to perform a color display, the opposite substrate 1 is usually provided with a colored pattern composed of fine colored regions of red (R), blue (B) and green (G), which are three primary colors of light. . This coloring pattern called a color filter,
Coloring films of three primary colors are respectively allocated to three mutually adjacent pixels, and a color tone display can be performed by adjusting the relative ratio of light intensity for such three adjacent pixels. In a display device that performs color display, a set of three minimum display units of R, G, and B is often counted as one pixel, but in this specification, the minimum display unit is referred to as a pixel. .
【００１１】３原色の着色パターンは、次のようにして
形成される。いずれかの原色の顔料を分散させた材料を
スピンコータまたはカーテンコータ等により基板全面に
塗布した後、フォトリソグラフィーを用いるパターニン
グによって、当該原色に割り当てられた画素上にのみ着
色膜が形成されるようにする。他の原色についても同様
に行い、都合３回の塗布及びパターニングの工程により
３原色の着色パターンを得る。The three primary color patterns are formed as follows. After applying a material in which a pigment of any of the primary colors is dispersed over the entire surface of the substrate by a spin coater or a curtain coater or the like, by patterning using photolithography, a colored film is formed only on pixels assigned to the primary color. I do. The same process is performed for the other primary colors, and a colored pattern of the three primary colors is obtained by three times of coating and patterning steps.
【００１２】一方、液晶層の厚さを均一にするために
は、アレイ基板と対向基板とを貼り合わせる前に、いず
れかの基板上に、直径が均一な樹脂の球が散布される。
この樹脂の球は、スペーサと呼ばれている。On the other hand, in order to make the thickness of the liquid crystal layer uniform, resin balls having a uniform diameter are scattered on one of the substrates before bonding the array substrate and the counter substrate.
This resin sphere is called a spacer.
【００１３】[0013]
【発明が解決しようとする課題】しかし、この球状スペ
ーサは、部分的に凝集を起こし、甚だしい場合には、液
晶表示装置の表示面に輝点状の欠点を形成する。また、
散布密度の偏りにより球状スペーサがほとんど存在しな
い領域が生じると、この領域の液晶層の厚さが他の領域
に比べて小さくなることから、表示画面におけるコント
ラスト比が不均一となり、表示画像の劣化を生じる。ま
た、球状スペーサは、画素中の表示領域にも分布するた
め、この球状スペーサそのものによる光漏れが生じる
他、球状スペーサの周辺の液晶分子の配向不良による光
漏れも生じる。これら光漏れはコントラスト比の低下を
招く。However, this spherical spacer partially agglomerates, and in extreme cases, forms a bright spot defect on the display surface of the liquid crystal display device. Also,
If there is a region where there is almost no spherical spacer due to uneven distribution density, the thickness of the liquid crystal layer in this region will be smaller than in other regions, so the contrast ratio on the display screen will be non-uniform and the display image will deteriorate. Is generated. Further, since the spherical spacers are also distributed in the display area in the pixel, light leakage occurs due to the spherical spacers themselves, and also light leakage due to poor alignment of liquid crystal molecules around the spherical spacers. These light leaks lower the contrast ratio.
【００１４】一方、着色パターンをなす着色膜は、一般
には、３原色についてそれぞれ別個の工程によって形成
される。このため、厚さを充分に均一にすることは困難
であり、通常、ある原色の着色膜の領域と、これに隣接
する別の原色の着色膜の領域との間には、段差、すなわ
ち、基板の表面から見た場合の高低差が生じる。On the other hand, a colored film forming a colored pattern is generally formed by separate steps for each of the three primary colors. For this reason, it is difficult to make the thickness sufficiently uniform, and in general, there is a step between the region of a colored film of one primary color and the region of a colored film of another primary color adjacent thereto, that is, a step. A height difference occurs when viewed from the surface of the substrate.
【００１５】特に、液晶表示装置による色再現性につい
て、自然色表示に近いところまで改善するためには、着
色パターンの色濃度を増大させるべく、着色パターンを
形成する着色膜の厚さを大きくとる必要がある。ところ
が、このように３原色のそれぞれの着色膜の厚さを全体
に大きくすれば、着色膜領域間の厚さの差もまた大きく
なる。通常、着色膜の厚さを１μｍ程度にする必要があ
るが、この場合、厚さのばらつきは０．２μｍ程度にま
で達する。In particular, in order to improve the color reproducibility of the liquid crystal display device to a level close to natural color display, the thickness of the colored film forming the colored pattern is increased to increase the color density of the colored pattern. There is a need. However, if the thicknesses of the colored films of the three primary colors are increased as a whole, the difference in thickness between the colored film regions is also increased. Normally, the thickness of the colored film needs to be about 1 μm, but in this case, the variation in thickness reaches about 0.2 μm.
【００１６】着色膜の厚さを１μｍよりも大きくする場
合には、厚さのばらつきがさらに大きくなる。スピンコ
ータ、カーテンコータ等の塗布装置では、顔料を多く含
み高粘度である着色膜材料の基板上の分布を充分に均一
にできないためである。When the thickness of the colored film is made larger than 1 μm, the variation of the thickness is further increased. This is because in a coating device such as a spin coater or a curtain coater, the distribution of a high-viscosity colored film material containing a large amount of pigment on a substrate cannot be made sufficiently uniform.
【００１７】このような着色膜の厚さのばらつきは、着
色パターンを形成する基板のサイズが大型になるほど、
一層顕著となる。Such a variation in the thickness of the colored film becomes more pronounced as the size of the substrate on which the colored pattern is formed becomes larger.
It becomes even more noticeable.
【００１８】上記に説明したような、球状スペーサの分
布の偏りや、着色膜の厚さのばらつきによって、液晶層
の厚さが不均一になった場合、特に、液晶材料の複屈折
効果を利用した表示モードの液晶表示装置において表示
性能の劣化が甚だしい。As described above, when the thickness of the liquid crystal layer becomes non-uniform due to the uneven distribution of the spherical spacers and the variation in the thickness of the colored film, the birefringence effect of the liquid crystal material is particularly utilized. The display performance of the liquid crystal display device in the above-mentioned display mode is significantly deteriorated.
【００１９】本発明は、上記問題点に鑑みなされたもの
であり、液晶材料の複屈折効果に基づいて表示光の制御
を行う液晶表示装置において、液晶層の厚さのばらつき
を低減することができ、これにより、コントラスト比の
ずれ等の、表示画像の劣化を来した部分が生じるのを防
止することができるものを提供する。SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and it is an object of the present invention to reduce the variation in the thickness of a liquid crystal layer in a liquid crystal display device that controls display light based on the birefringence effect of a liquid crystal material. Accordingly, the present invention provides an image display apparatus capable of preventing the occurrence of a portion where a display image is deteriorated, such as a shift in contrast ratio.
【００２０】[0020]
【課題を解決するための手段】請求項１の発明の液晶表
示装置は、第１の絶縁基板上にカラーフィルタ層が配置
された第１の基板と、前記第１の基板に対向する第２の
基板と、前記第１又は前記第２の基板の少なくとも一方
に一体的に配置され所定の間隙を維持するスペーサ突起
と、前記間隙に保持される液晶層とを備え、この液晶層
の複屈折効果に基づいて表示動作を行なう複数の画素領
域を備えた液晶表示装置であって、前記カラーフィルタ
層は、前記第１の絶縁基板上に配置される樹脂層が、前
記画素領域に対応して所望の色に染色されて成ることを
特徴とする。According to a first aspect of the present invention, there is provided a liquid crystal display device comprising: a first substrate having a color filter layer disposed on a first insulating substrate; and a second substrate facing the first substrate. , A spacer projection integrally arranged on at least one of the first and second substrates and maintaining a predetermined gap, and a liquid crystal layer held in the gap. A liquid crystal display device including a plurality of pixel regions performing a display operation based on an effect, wherein the color filter layer has a resin layer disposed on the first insulating substrate corresponding to the pixel region. It is characterized by being dyed in a desired color.
【００２１】上記のような構成であると、球状スペーサ
を用いた場合のような分布の偏りや凝集による表示性能
の劣化が生じず、また、液晶層の厚さの不均一による表
示性能の劣化を大幅に低減することができる。With the above structure, the display performance is not degraded due to uneven distribution or aggregation as in the case of using a spherical spacer, and the display performance is degraded due to the uneven thickness of the liquid crystal layer. Can be greatly reduced.
【００２２】請求項２の液晶表示装置は、前記樹脂層は
染料受容材料から成り、前記画素領域毎に染料が吐出さ
れて構成されることを特徴とする。According to a second aspect of the present invention, in the liquid crystal display device, the resin layer is made of a dye receiving material, and a dye is discharged for each of the pixel regions.
【００２３】上記構成により、一体型のカラーフィルタ
層を低いコストで容易に作成することができる。With the above structure, an integrated color filter layer can be easily formed at low cost.
【００２４】請求項３の液晶表示装置は、前記第１の基
板は、前記画素領域の周辺に配置される遮光膜を含み、
前記スペーサ突起は、前記遮光膜に対応する領域内に設
けられることを特徴とする。According to a third aspect of the present invention, in the liquid crystal display device, the first substrate includes a light-shielding film disposed around the pixel region.
The spacer protrusion is provided in a region corresponding to the light shielding film.
【００２５】このような構成であると、スペーサ材自身
による光漏れや、スペーサ材周辺の液晶の配向不良領域
形成に起因するコントラスト比の低下や開口率の低下を
防止することができる。With such a configuration, it is possible to prevent a light leak due to the spacer material itself, a decrease in the contrast ratio and a decrease in the aperture ratio due to the formation of a poorly aligned region of the liquid crystal around the spacer material.
【００２６】請求項４の液晶表示装置は、前記スペーサ
突起が、前記染料受容材料の層の上に直接設けられてな
ることを特徴とする。According to a fourth aspect of the present invention, in the liquid crystal display device, the spacer projection is provided directly on the dye receiving material layer.
【００２７】このような構成であると、スペーサ突起が
凹凸の少ない面の上に設けられるため、基板間の間隔を
より均一に制御することができる。With such a configuration, since the spacer projections are provided on the surface with little unevenness, the distance between the substrates can be controlled more uniformly.
【００２８】請求項６の液晶表示装置は、前記スペーサ
突起が、透明な光硬化性樹脂からなることを特徴とす
る。According to a sixth aspect of the present invention, in the liquid crystal display device, the spacer projection is made of a transparent photocurable resin.
【００２９】このような構成であると、突出寸法が均一
なスペーサ突起を容易に作成することができる。With such a configuration, a spacer projection having a uniform projection size can be easily formed.
【００３０】[0030]
【発明の実施の形態】本発明の実施例について、ＩＰＳ
型の液晶表示装置の例により、図１〜４を用いて説明す
る。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS For an embodiment of the present invention, IPS
An example of a liquid crystal display device will be described with reference to FIGS.
【００３１】図１は、実施例の液晶表示装置の要部を説
明するための模式的な部分切開斜視図である。FIG. 1 is a schematic partially cutaway perspective view for explaining the main part of the liquid crystal display device of the embodiment.
【００３２】下方に図示する対向基板１は、透明絶縁基
板１０上に、碁盤目状のブラックマトリクス１３、基板
上のほぼ全面を被覆する単一の染料受容層１２、及び柱
状の複数のスペーサ突起１１が、この順に形成されてな
る。The opposing substrate 1 shown below comprises a transparent insulating substrate 10 on which a grid matrix black matrix 13, a single dye receiving layer 12 covering almost the entire surface of the substrate, and a plurality of columnar spacer projections are provided. 11 are formed in this order.
【００３３】染料受容層１２の上面は、凹凸、及び、透
明絶縁基板１０から見た高低差が著しく小さい。また、
この上に形成されるスペーサ突起１１の突出寸法のばら
つきは極めて少ない。したがって、セルギャップと呼ば
れる、対向基板１とアレイ基板２との間隔についての、
液晶表示装置内におけるばらつきは非常に小さい。The upper surface of the dye receiving layer 12 has significantly small irregularities and a height difference as viewed from the transparent insulating substrate 10. Also,
Variations in the protrusion dimensions of the spacer protrusions 11 formed thereon are extremely small. Therefore, the distance between the opposing substrate 1 and the array substrate 2, called the cell gap,
The variation in the liquid crystal display device is very small.
【００３４】以下にこの対向基板１の製造工程につい
て、図２〜３を用いて説明する。The manufacturing process of the counter substrate 1 will be described below with reference to FIGS.
【００３５】図２には、３原色の着色パターンを備えた
染料受容層１２の形成工程について模式的に示す。FIG. 2 schematically shows a process of forming the dye receiving layer 12 having a coloring pattern of three primary colors.
【００３６】１．ブラックマトリクス樹脂層の形成 対向基板１の透明絶縁基板１０上に、カーボン等のブラ
ック顔料を含む樹脂がほぼ全面に塗布された後、フォト
リソグラフィーによって所定の碁盤目形状にパターニン
グされる。ブラックマトリクス１３をなす樹脂層の厚さ
は、約１μｍとなるようにした。ブラックマトリクス１
３を金属ではなく樹脂層によって形成するのは、ＩＰＳ
型液晶表示装置にあって横方向電界に対する影響を除く
ためである。樹脂層でブラックマトリクス１３を形成す
るため、金属層の場合に比べて大きい、約１μｍ以上の
厚さとすることが望ましい。1. Formation of Black Matrix Resin Layer After a resin containing a black pigment such as carbon is applied to almost the entire surface of the transparent insulating substrate 10 of the opposing substrate 1, it is patterned into a predetermined grid pattern by photolithography. The thickness of the resin layer forming the black matrix 13 was set to about 1 μm. Black matrix 1
3 is formed of a resin layer instead of a metal
This is to eliminate the influence on the lateral electric field in the liquid crystal display device. In order to form the black matrix 13 with the resin layer, it is preferable that the thickness is about 1 μm or more, which is larger than that of the metal layer.
【００３７】２．染料受容層の塗布 スピンコータを用いて、染料受容層１２をなす硬化性樹
脂を基板上に塗布する。この硬化性樹脂は、顔料を含む
ものでなく粘度が充分に低いものであるため、スピンコ
ータ等により基板全面にわたって均一な厚さに塗布する
ことができる。したがって、塗布された樹脂の表面は凹
凸がほとんどなく極めて平滑である。2. Application of Dye Receiving Layer A curable resin forming the dye receiving layer 12 is applied on a substrate by using a spin coater. Since the curable resin does not contain a pigment and has a sufficiently low viscosity, it can be applied to a uniform thickness over the entire surface of the substrate by a spin coater or the like. Therefore, the surface of the applied resin is very smooth with almost no irregularities.
【００３８】３．インクジェット描画（Ｒ，Ｇ，Ｂ同
時） 充分に硬化する前の染料受容層１２の上に、インクジェ
ット描画方式により、染料のパターンが描画される。レ
ッド（Ｒ）、グリーン（Ｇ）、及びブルー（Ｂ）の着色
パターンを形成する各領域に所定の色の染料が吐出され
る。インクジェット描画方式であるため、３色の染料３
−Ｒ，３−Ｂ，３−Ｇを同時に各所定領域に塗布するこ
とができ、パターニングの工程を要しない。3. Ink Jet Drawing (R, G, B Simultaneously) A dye pattern is drawn on the dye receiving layer 12 before being sufficiently cured by an ink jet drawing method. A dye of a predetermined color is discharged to each area forming a red (R), green (G), and blue (B) coloring pattern. Because of the ink jet drawing method, three color dyes 3
-R, 3-B, 3-G can be simultaneously applied to each predetermined area, and a patterning step is not required.
【００３９】インクジェット装置としては、例えばバブ
ルジェット式のものを用いることができる。As the ink jet device, for example, a bubble jet type can be used.
【００４０】このような方法により染料を塗出するにあ
たり、色間での不所望な混色を防止するために、ブラッ
クマトリクス１３上の領域のみ染料を受容しないよう十
分に硬化処理等することが有効である。In applying the dye by such a method, in order to prevent undesired color mixing between colors, it is effective to sufficiently perform a curing treatment or the like so that only the region on the black matrix 13 does not receive the dye. It is.
【００４１】４．染料の定着、及び染料受容層の硬化 受容層が熱硬化性樹脂で構成される場合は、所定の加熱
を行うことにより、塗出された染料３−Ｒ，３−Ｂ，３
−Ｇの層を染料受容層に定着させつつ染料受容層１２の
硬化を進める。尚、この受容層は光硬化型樹脂等で構成
することもでき、この場合は光照射により定着処理を行
なう。4. Fixing of Dye and Curing of Dye Receiving Layer When the receiving layer is composed of a thermosetting resin, the applied dyes 3-R, 3-B, 3
The curing of the dye receiving layer 12 is advanced while fixing the layer -G to the dye receiving layer. The receiving layer can be made of a photo-curable resin or the like. In this case, the fixing process is performed by light irradiation.
【００４２】この後、さらに充分に加熱して、染料受容
層１２の硬化を完結させる。得られた染料受容層１２の
厚さは約１．５μｍであった。Thereafter, heating is further sufficiently performed to complete the curing of the dye receiving layer 12. The thickness of the obtained dye receiving layer 12 was about 1.5 μm.
【００４３】平らな染料受容層１２を染料で染色したも
のであるため、着色パターンをなす層の表面凹凸は極め
て少ない。Ｒ，Ｇ，Ｂそれぞれの着色領域を、顔料を含
むコーティング層のパターニングにより作成する場合に
比べて、表面粗さは、１０分の１程度、またはそれ以下
とすることができる。Since the flat dye-receiving layer 12 is dyed with a dye, the surface of the layer forming the colored pattern has very few irregularities. The surface roughness can be reduced to about 1/10 or less as compared with the case where each of the R, G, and B colored regions is formed by patterning a coating layer containing a pigment.
【００４４】図３には、柱状のスペーサ突起１１の形成
工程について模式的に示す。FIG. 3 schematically shows a process of forming the columnar spacer projections 11.
【００４５】１．光硬化性樹脂の塗布 上記図２の工程に引き続き、スピンコータを用いて、光
硬化性樹脂４を約５μｍの均一な厚さに塗布する。光硬
化性樹脂４として充分に低粘度のものを選択することに
より、極めて均一に塗布することができる。1. Application of Photocurable Resin Following the process of FIG. 2, the photocurable resin 4 is applied to a uniform thickness of about 5 μm using a spin coater. By selecting a photocurable resin 4 having a sufficiently low viscosity, coating can be performed very uniformly.
【００４６】２．マスクパターンを用いた露光 マスクパターンを用いた露光により、スペーサ突起１１
を形成する領域にのみ、紫外線を照射して硬化を行わせ
る。光硬化性樹脂として、透明度が高いものを選択し、
増感剤等の選択及び配合を最適化することにより、この
ように厚さがかなり大きい塗布層であっても充分に選択
的な硬化を行わせることができる。2. Exposure Using Mask Pattern Exposure using the mask pattern causes spacer protrusions 11
Only the region where is formed is irradiated with ultraviolet rays to be cured. Select a highly transparent resin as the photocurable resin,
By optimizing the selection and blending of the sensitizer and the like, even a coating layer having such a large thickness can be sufficiently selectively cured.
【００４７】なお、スペーサ突起１１自身によるコント
ラスト比の低下や開口率の低下を招かないようにするた
め、スペーサ突起１１は、ブラックマトリクス１３が配
された領域内、または、下記のアレイ基板の補助容量形
成用電極等の配線によって光が遮蔽される領域内に設け
る。In order to prevent a decrease in the contrast ratio and a decrease in the aperture ratio due to the spacer projections 11 themselves, the spacer projections 11 are provided in the region where the black matrix 13 is arranged or in the auxiliary array substrate described below. It is provided in a region where light is shielded by wiring such as a capacitance forming electrode.
【００４８】３．未硬化樹脂の除去 適当な溶剤またはエッチング薬剤を用いて、紫外線照射
領域以外の未硬化部分の光硬化性樹脂４を除去し、洗浄
を行う。3. Removal of Uncured Resin The photocurable resin 4 in an uncured portion other than the ultraviolet irradiation region is removed by using a suitable solvent or an etching agent, and washing is performed.
【００４９】光照射の選択性、及び、未硬化樹脂の除去
工程について完璧とはできないため、得られた柱状のス
ペーサ突起１１の周面は、先端に向かって若干テーパー
状となる。しかし、若干のテーパー形成は全く問題とな
らない。テーパーの形成は、上記のような樹脂組成の選
択や露光条件、及び、除去工程の条件を最適化すること
により、充分に抑制することができる。Since the selectivity of light irradiation and the step of removing the uncured resin are not perfect, the peripheral surface of the obtained columnar spacer projection 11 is slightly tapered toward the tip. However, slight taper formation does not pose any problem. The formation of the taper can be sufficiently suppressed by optimizing the selection of the resin composition, the exposure conditions, and the conditions of the removal step as described above.
【００５０】以上に説明したように、実施例に係るスペ
ーサ突起１１の形成工程においては、突起の突出寸法を
極めて均一に制御することができる。したがって、図２
を用いて説明したように、平らで高低差のない染料受容
層１２の上にスペーサ突起１１を設けるならば、スペー
サ突起１１の先端面の高さを均一にすることができる。As described above, in the step of forming the spacer protrusion 11 according to the embodiment, the protrusion size of the protrusion can be controlled very uniformly. Therefore, FIG.
If the spacer protrusions 11 are provided on the dye receiving layer 12 which is flat and has no difference in height, the height of the distal end surface of the spacer protrusions 11 can be made uniform.
【００５１】なお、実施例の液晶表示装置におけるアレ
イ基板２の構成は、下記に図４を用いて説明するよう
に、ＩＰＳ型液晶表示装置についての一般的なものであ
る。The configuration of the array substrate 2 in the liquid crystal display device of the embodiment is a general configuration of an IPS type liquid crystal display device as described below with reference to FIG.
【００５２】図４には、アレイ基板２の各画素領域につ
いての基本構成を模式的に示す。FIG. 4 schematically shows the basic structure of each pixel area of the array substrate 2.
【００５３】線状に延びる画素電極２１の両側には、２
本の線状の対向電極２２，２７が、画素電極２１から常
に一定の距離をなして並行に延びている。On both sides of the pixel electrode 21 extending linearly,
The linear opposing electrodes 22 and 27 always extend in parallel at a constant distance from the pixel electrode 21.
【００５４】画素電極２１は、走査線２３をゲート電極
とするＴＦＴ（薄膜トランジスタ）部２６を介して信号
線２４と接続している。図示のように、このＴＦＴ部２
６は、画素電極２１についてのＴＦＴ側の先端から延在
された延在部２１ａをソース電極とし、信号線の延在部
２４ａをドレイン電極としている。The pixel electrode 21 is connected to a signal line 24 via a TFT (thin film transistor) section 26 using the scanning line 23 as a gate electrode. As shown in FIG.
Reference numeral 6 designates the extension 21a extending from the tip of the pixel electrode 21 on the TFT side as a source electrode, and the extension 24a of the signal line as a drain electrode.
【００５５】２本の対向電極２２，２７についてのＴＦ
Ｔから遠い側の先端は、対向電極側の補助容量電極板２
２ｂを介してコモン配線２５に接続される。また、画素
電極２１についてのＴＦＴから遠い側の先端からは、画
素電極側の補助容量電極板２１ｂが延在している。The TF for the two opposing electrodes 22 and 27
The tip farther from T is the auxiliary capacitance electrode plate 2 on the counter electrode side.
It is connected to the common wiring 25 via 2b. In addition, an auxiliary capacitance electrode plate 21b on the pixel electrode side extends from the tip of the pixel electrode 21 on the side farther from the TFT.
【００５６】２本の対向電極２２，２７についてのＴＦ
Ｔ側の先端は、連結部２２ａにより互いに電気的に接続
しており、これにより、両対向電極２２，２７の電位差
のばらつきが低減される。TF for the two opposing electrodes 22 and 27
The tips on the T side are electrically connected to each other by the connecting portion 22a, thereby reducing the variation in the potential difference between the opposing electrodes 22, 27.
【００５７】図１〜３中に示したブラックマトリクス１
３は、対向電極２２またはその延在部と、走査線２３ま
たは信号線２４との隙間、及び、ＴＦＴ部分１６を遮蔽
するものである。また、上記の各画素領域の着色膜は、
画素電極２１と対向電極２２とに挟まれた画素表示領域
を覆うためのものである。The black matrix 1 shown in FIGS.
Reference numeral 3 denotes a gap between the counter electrode 22 or its extending portion and the scanning line 23 or the signal line 24, and a portion for shielding the TFT portion 16. Further, the coloring film of each of the above pixel regions is
This is for covering a pixel display area sandwiched between the pixel electrode 21 and the counter electrode 22.
【００５８】以上に説明したように、本実施例では、対
向基板２とアレイ基板１との間の間隔を均一にするため
のスペーサが、対向基板２上の突起として設けられるた
め、球状スペーサを用いた場合のような分布の偏りや凝
集といった問題が生じることがない。また、着色パター
ンを形成した基板表面は平らな染料受容層１２よりなる
ため凹凸や段差が極めて少ないものであり、この平らな
染料受容層１２の上に均一な突出寸法のスペーサ突起１
１が設けられるため、基板間の間隔のばらつきを最小限
とすることができる。As described above, in this embodiment, since the spacers for equalizing the distance between the opposing substrate 2 and the array substrate 1 are provided as protrusions on the opposing substrate 2, spherical spacers are used. There is no problem such as uneven distribution or aggregation as in the case of using. Further, since the surface of the substrate on which the colored pattern is formed is formed of the flat dye receiving layer 12, there are very few irregularities and steps, and the spacer projections 1 having uniform protrusion dimensions are formed on the flat dye receiving layer 12.
Since 1 is provided, it is possible to minimize the variation in the interval between the substrates.
【００５９】このように、基板間の間隔すなわち液晶層
の厚さのばらつきを大幅に低減することができるため、
画像表示面中のコントラスト比のばらつきや表示性能劣
化部分の発生が大幅に抑制されている。As described above, since the distance between the substrates, that is, the variation in the thickness of the liquid crystal layer can be greatly reduced,
Variations in the contrast ratio on the image display surface and occurrence of display performance degradation portions are greatly suppressed.
【００６０】また、スペーサ突起１１の製造は、通常の
コーティング及びパターニングにより行うことができる
ため、液晶表示装置のコストの増大をほとんど招かな
い。なお、染料受容層１２の染色による着色パターンの
形成は、インクジェット方式等により簡便に行うことが
できるため、色ごとにコーティングとパターニングを行
う場合に比べて製造コストを低減することがきるもので
ある。Since the spacer projections 11 can be manufactured by ordinary coating and patterning, the cost of the liquid crystal display device hardly increases. Since the formation of a colored pattern by dyeing the dye receiving layer 12 can be easily performed by an inkjet method or the like, the manufacturing cost can be reduced as compared with the case where coating and patterning are performed for each color. .
【００６１】上記実施例においては、対向基板１上に柱
状のスペーサ突起１１を設けたが、アレイ基板２上に形
成してもほぼ同様の効果を得ることができる。また、ア
レイ基板の構造によっては、染料受容層１２をアレイ基
板２上に設けることもできる。In the above embodiment, the columnar spacer projections 11 are provided on the counter substrate 1. However, almost the same effects can be obtained by forming them on the array substrate 2. Further, depending on the structure of the array substrate, the dye receiving layer 12 can be provided on the array substrate 2.
【００６２】[0062]
【発明の効果】基板間の間隔すなわち液晶層の厚さのば
らつきを大幅に低減することができるため、特には液晶
材料の複屈折効果により表示光の制御を行う液晶表示装
置において、画像表示面中のコントラスト比のばらつき
や表示性能劣化部分の発生を大幅に抑制することができ
る。Since the distance between the substrates, that is, the variation in the thickness of the liquid crystal layer can be greatly reduced, the image display surface is particularly used in a liquid crystal display device which controls the display light by the birefringence effect of the liquid crystal material. It is possible to greatly suppress the variation in the contrast ratio and the occurrence of the display performance degradation portion.
【図１】実施例の液晶表示装置の要部を説明するための
模式的な部分切開斜視図である。FIG. 1 is a schematic partial cutaway perspective view for explaining a main part of a liquid crystal display device according to an embodiment.
【図２】実施例に係る、３原色の着色パターンの形成工
程について模式的に示す工程図である。FIG. 2 is a process diagram schematically showing a process of forming a three primary color pattern according to an example.
【図３】実施例に係る、柱状のスペーサ突起の形成工程
について模式的に示す工程図である。FIG. 3 is a process diagram schematically showing a process of forming a columnar spacer protrusion according to an example.
【図４】ＩＰＳ型液晶表示装置におけるアレイ基板の各
画素の基本構成について模式的に示す平面的な斜視図で
ある。FIG. 4 is a plan perspective view schematically showing a basic configuration of each pixel of an array substrate in the IPS type liquid crystal display device.
【図５】ＩＰＳ型液晶表示装置の液晶表示の原理につい
て説明するための概念的な断面斜視図である。FIG. 5 is a conceptual sectional perspective view for explaining the principle of liquid crystal display of the IPS type liquid crystal display device.
１ 対向基板 11 スペーサ突起 12 単一の染料受容層 ２ アレイ基板 DESCRIPTION OF SYMBOLS 1 Counter substrate 11 Spacer protrusion 12 Single dye receiving layer 2 Array substrate
フロントページの続き Ｆターム(参考） 2H048 BA11 BA48 BA64 BB44 2H090 HA03 HC05 HC12 HC15 JC17 JD03 LA02 LA04 LA15 2H091 FA02Y FA35Y FB02 FC05 FC12 FC22 FD04 GA13 LA03 LA15 LA17 2H092 JA24 JB14 JB51 JB52 MA10 MA18 MA37 NA04 PA03 PA08 PA09 QA09 Continued on the front page F term (reference) 2H048 BA11 BA48 BA64 BB44 2H090 HA03 HC05 HC12 HC15 JC17 JD03 LA02 LA04 LA15 2H091 FA02Y FA35Y FB02 FC05 FC12 FC22 FD04 GA13 LA03 LA15 LA17 2H092 JA24 JB14 JB51 JB09 MA04 MA10
Claims (9)
置された第１の基板と、前記第１の基板に対向する第２
の基板と、前記第１又は前記第２の基板の少なくとも一
方に一体的に配置され所定の間隙を維持するスペーサ突
起と、前記間隙に保持される液晶層とを備え、この液晶
層の複屈折効果に基づいて表示動作を行なう複数の画素
領域を備えた液晶表示装置であって、 前記カラーフィルタ層は、前記第１の絶縁基板上に配置
される樹脂層が、前記画素領域に対応して所望の色に染
色されて成ることを特徴とする液晶表示装置。A first substrate on which a color filter layer is disposed on a first insulating substrate; and a second substrate facing the first substrate.
, A spacer projection integrally arranged on at least one of the first and second substrates and maintaining a predetermined gap, and a liquid crystal layer held in the gap. A liquid crystal display device including a plurality of pixel regions that perform a display operation based on an effect, wherein the color filter layer has a resin layer disposed on the first insulating substrate corresponding to the pixel region. A liquid crystal display device characterized by being dyed in a desired color.
画素領域毎に染料が吐出されて構成されることを特徴と
する請求項１記載の液晶表示装置。2. The liquid crystal display device according to claim 1, wherein said resin layer is made of a dye receiving material, and is formed by discharging a dye for each of said pixel regions.
配置される遮光膜を含み、前記スペーサ突起は、前記遮
光膜に対応する領域内に設けられることを特徴とする請
求項１記載の液晶表示装置。3. The light-emitting device according to claim 1, wherein the first substrate includes a light-shielding film disposed around the pixel region, and the spacer protrusion is provided in a region corresponding to the light-shielding film. The liquid crystal display device as described in the above.
層の上に直接設けられてなることを特徴とする請求項１
記載の液晶表示装置。4. The method according to claim 1, wherein said spacer projection is provided directly on said dye receiving material layer.
The liquid crystal display device as described in the above.
領域毎に対向配置される画素電極と対向電極とを含み、
前記液晶層に前記第２の基板の主面に略平行な電界を作
用させることを特徴とする請求項１記載の液晶表示装
置。5. A method according to claim 1, wherein the first or second substrate includes a pixel electrode and a counter electrode which are arranged to face each other for each of the pixel regions.
2. The liquid crystal display device according to claim 1, wherein an electric field substantially parallel to a main surface of the second substrate is applied to the liquid crystal layer.
からなることを特徴とする請求項１記載の液晶表示装
置。6. The liquid crystal display device according to claim 1, wherein said spacer projection is made of a transparent photocurable resin.
び第２の基板面に対して略水平に、互いに略平行に配向
されることを特徴とする請求項１記載の液晶表示装置。7. The liquid crystal display device according to claim 1, wherein the liquid crystal molecules forming the liquid crystal layer are oriented substantially horizontally with respect to the first and second substrate surfaces and substantially parallel to each other. .
及び信号線によって制御されるスイッチング素子に電気
的に接続されて成ることを特徴とする請求項５記載の液
晶表示装置。8. The liquid crystal display device according to claim 5, wherein said pixel electrode for each said pixel region is electrically connected to a switching element controlled by a scanning line and a signal line.
差が略零の状態で黒表示を成すことを特徴とする請求項
８記載の液晶表示装置。9. The liquid crystal display device according to claim 8, wherein black display is performed when a potential difference between said pixel electrode and said counter electrode is substantially zero.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19330398A JP2000029055A (en) | 1998-07-08 | 1998-07-08 | Liquid crystal display device |
| TW088111308A TW528904B (en) | 1998-07-08 | 1999-07-02 | Liquid crystal display device |
| KR1019990027411A KR100315557B1 (en) | 1998-07-08 | 1999-07-08 | Liquid cristal display |
| US09/349,245 US6535188B1 (en) | 1998-07-08 | 1999-07-08 | Liquid crystal display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19330398A JP2000029055A (en) | 1998-07-08 | 1998-07-08 | Liquid crystal display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000029055A true JP2000029055A (en) | 2000-01-28 |
Family
ID=16305676
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19330398A Pending JP2000029055A (en) | 1998-07-08 | 1998-07-08 | Liquid crystal display device |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US6535188B1 (en) |
| JP (1) | JP2000029055A (en) |
| KR (1) | KR100315557B1 (en) |
| TW (1) | TW528904B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100827853B1 (en) * | 2001-05-30 | 2008-05-07 | 비오이 하이디스 테크놀로지 주식회사 | Method of manufacturing high aperture ratio lcd |
| US7659960B2 (en) | 2005-01-27 | 2010-02-09 | Toshiba Matsushita Display Technology Co., Ltd. | Liquid crystal display device with spherical spacers in contact holes |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3634249B2 (en) * | 1999-09-24 | 2005-03-30 | シャープ株式会社 | Liquid crystal display device and display method thereof |
| JP2002098948A (en) * | 2000-09-20 | 2002-04-05 | Hitachi Ltd | Method for manufacturing liquid crystal display device |
| US7425970B1 (en) * | 2000-11-08 | 2008-09-16 | Palm, Inc. | Controllable pixel border for a negative mode passive matrix display device |
| US7724270B1 (en) | 2000-11-08 | 2010-05-25 | Palm, Inc. | Apparatus and methods to achieve a variable color pixel border on a negative mode screen with a passive matrix drive |
| US6961029B1 (en) | 2000-11-08 | 2005-11-01 | Palm, Inc. | Pixel border for improved viewability of a display device |
| KR100412126B1 (en) * | 2001-05-31 | 2003-12-31 | 비오이 하이디스 테크놀로지 주식회사 | Method for manufacturing supporting spacer in liquid crystal display device |
| JP2002365425A (en) * | 2001-06-12 | 2002-12-18 | Rohm Co Ltd | Color liquid crystal display device and method for manufacturing the same |
| JP4181376B2 (en) * | 2002-10-25 | 2008-11-12 | セイコーエプソン株式会社 | Liquid crystal device, method for manufacturing liquid crystal device, and electronic apparatus |
| JP4244289B2 (en) * | 2002-10-31 | 2009-03-25 | シャープ株式会社 | Substrate for liquid crystal display device and liquid crystal display device including the same |
| KR100934332B1 (en) * | 2005-07-11 | 2009-12-29 | 후지쯔 가부시끼가이샤 | Liquid crystal display element |
| CN104216038B (en) * | 2014-08-28 | 2017-09-22 | 京东方科技集团股份有限公司 | The manufacture method and colored filter of colored filter |
| WO2016084232A1 (en) * | 2014-11-28 | 2016-06-02 | 堺ディスプレイプロダクト株式会社 | Liquid crystal display panel, liquid crystal display device, and method for manufacturing liquid crystal display panel |
| CN111163600A (en) * | 2019-12-31 | 2020-05-15 | Oppo广东移动通信有限公司 | Housing, electronic device, and method for manufacturing housing |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2933816B2 (en) * | 1993-07-15 | 1999-08-16 | シャープ株式会社 | Liquid crystal display device and method of manufacturing the same |
| JP3059678B2 (en) * | 1995-07-14 | 2000-07-04 | キヤノン株式会社 | Method and apparatus for manufacturing color filter |
| JPH10123534A (en) * | 1996-10-23 | 1998-05-15 | Toshiba Corp | Liquid crystal display element |
| JPH112716A (en) * | 1997-06-13 | 1999-01-06 | Canon Inc | Color filters, liquid crystal element using the same, their production as well as ink for ink jet used for the process for production |
-
1998
- 1998-07-08 JP JP19330398A patent/JP2000029055A/en active Pending
-
1999
- 1999-07-02 TW TW088111308A patent/TW528904B/en not_active IP Right Cessation
- 1999-07-08 KR KR1019990027411A patent/KR100315557B1/en not_active IP Right Cessation
- 1999-07-08 US US09/349,245 patent/US6535188B1/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100827853B1 (en) * | 2001-05-30 | 2008-05-07 | 비오이 하이디스 테크놀로지 주식회사 | Method of manufacturing high aperture ratio lcd |
| US7659960B2 (en) | 2005-01-27 | 2010-02-09 | Toshiba Matsushita Display Technology Co., Ltd. | Liquid crystal display device with spherical spacers in contact holes |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20000011567A (en) | 2000-02-25 |
| KR100315557B1 (en) | 2001-12-12 |
| US6535188B1 (en) | 2003-03-18 |
| TW528904B (en) | 2003-04-21 |
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